I highly recommend Fahsai Homestay. There is so much to say about this wonderful gem amidst the chaos of Bangkok. From being greeted at my room moments after I arrived by the hosts 7 year old daughter (with an iced tea) to the rich history of this 4th generation home, it was truly sublime! Oh, and the DIY coffee is the best I've ever had (grown on the owners plantation in the South of Thailand). Go, you won't be disappointed.